Each website needs money to maintain its business. Everything is fine if it running from money from advertising. If a service accepts fees for placing information on its website, it will never be objective.
I agree to advertise with a disclaimer and it's is not really promoting what is being advertised on their website, but recommending project through their newsletter and giving them high rating because they were paid to do that is a big no-no and not recommended, unless they can guaranty that the site they are recommending is a legit project and they will be responsible for any scamming, they cannot accept payment and put up a disclaimer that they have no responsibility fot their action.